body {
    font-family: Arial, sans-serif;
    background: #f0f5ff;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}

.section {
    margin: 25px 0;
    padding: 15px;
    background: #f9fbff;
    border-radius: 8px;
    border: 1px solid #d0e0ff;
}

button {
    background: #3498db;
    color: white;
    border: none;
    padding: 12px 20px;
    margin: 10px 5px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
}

button:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
}

.config {
    margin: 15px 0;
}

.result {
    margin-top: 30px;
    text-align: center;
}

.qr-item {
    display: none;
    text-align: center;
    border: 1px solid #eee;
    padding: 20px;
    border-radius: 8px;
    background: #fafafa;
    margin: 0 auto;
    max-width: 500px;
}

.qr-item.active {
    display: block;
}

.qr-item canvas {
    width: 200px;
    height: 200px;
    margin: 10px auto;
    display: block;
}

.qr-controls {
    margin: 15px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.qr-size-controls {
    margin: 10px 0;
}

.qr-size-controls select {
    padding: 5px 10px;
    border-radius: 4px;
    border: 1px solid #ddd;
    font-size: 14px;
}

#pageInfo {
    font-weight: bold;
    color: #2c3e50;
    min-width: 120px;
}

#log {
    margin-top: 30px;
    padding: 15px;
    background: #fff3cd;
    border-left: 5px solid #ffc107;
    border-radius: 5px;
    font-size: 14px;
    display: none;
}